Question

Another name of Gravity Die Casting is?

(a) Centrifugal casting

(b) Permanent mould casting

(c) Precision investment casting

(d) Hot chamber process

The question was asked during an interview.

This intriguing question comes from Special Casting Techniques topic in division Special Casting Techniques of Casting-Forming-Welding I

Answer 1

The correct answer is:

(b) Permanent mould casting

Explanation:

• Gravity Die Casting is also known as Permanent Mould Casting. In this process, molten metal is poured into a reusable steel mold, and gravity is used to fill the mold with metal. It's called "permanent" because the mold can be reused multiple times.

The other options are different casting techniques:

• Centrifugal casting (a) involves using centrifugal force to distribute molten metal in a rotating mold.
• Precision investment casting (c) is a process where a pattern is made from wax and coated in a ceramic shell before being melted out to leave a precise mold.
• Hot chamber process (d) is typically used in die casting for metals with lower melting points, like zinc or lead.

Thus, the correct term for Gravity Die Casting is Permanent Mould Casting.